A Guide to the design of traffic signals.

Subjects: “…Traffic signs and signals…”

Manual on traffic control devices, standard traffic signs.

Subjects: “…Traffic signs and signals.…”

Manual on traffic control devices temporary signs and works zones control.

Subjects: “…Traffic signs and signals…”

Highway maintenance handbook

Subjects: “…Traffic signs and signals Maintenance and repair Handbooks, manuals, etc.…”